A compartmentation approach to deconstruct ecosystem carbon fluxes of a Moso bamboo forest in subtropical China  

作　　者：Jianhua Lv Quan Li Tingting Cao Man Shi Changhui Peng Lei Deng Xinzhang Song 

机构地区：[1]College of Landscape Architecture and Forestry,Qingdao Agricultural University,Qingdao,266109,China [2]State Key Laboratory of Subtropical Silviculture,Zhejiang A&F University,Hangzhou,311300,China [3]School of Geographic Sciences,Hunan Normal University,Changsha,410000,China [4]Institute of Environment Sciences,Department of Biology Sciences,University of Quebec at Montreal,Case Postale 8888,Succursale Centre-Ville,Montreal,H3C3P8,Canada [5]State Key Laboratory for Soil Erosion and Dryland Farming on the Loess Plateau,Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling,Shaanxi,712100,China

出　　处：《Forest Ecosystems》2025年第2期300-310,共11页森林生态系统(英文版)

基　　金：sponsored by the National Natural Science Foundation of China(Grant Nos.32125027,31930075);Zhejiang A&F University Research and Development Fund(No.2022LFR006).

摘　　要：Moso bamboo(Phyllostachys edulis)forests are a vital resource in subtropical China,known for their high carbon(C)sequestration capacity.However,the dynamic processes of C fluxes within each component(canopy,culm,and soil)and their individual contributions,particularly during on-and off-years,remain unclear.A 2-year field experiment was conducted to investigate the dynamics of C fluxes from the canopy,culm,and soil(partitioned into heterotrophic,rhizome,and stump respiration)and their contributions to net ecosystem productivity(NEP)in a representative Moso bamboo forest in the subtropical region of China.The average annual NEP of the Moso bamboo forest was 7.31±2.76 t C·ha^(-1).Specifically,the canopy's annual net C uptake was 17.30±3.23 tC·ha^(-1),accounting for 237%of NEP.In contrast,C emissions from heterotrophs,culms,rhizomes,and stumps were 5.37±1.20,2.18±1.05,1.29±0.04,and 1.15±0.33 t C·ha^(-1),accounting for73%,30%,18%,and16%of NEP,respectively.The NEP,net cumulative C uptake in the canopy,and C emissions from the respiration of heterotrophs and stumps were all significantly higher during on-years when compared to off-years,whereas C emissions from bamboo culms displayed opposite trends.These findings offer a new approach for quantifying the C budgets of Moso bamboo forests and provide valuable insights into the C cycling processes in forest ecosystems.

关 键 词：Carbon budget Ecosystem respiration Phyllostachys edulis Source-sink relations Stand age 

分 类 号：S795.9[农业科学—林木遗传育种]